<?php

$iterator = new RecursiveDirectoryIterator('D:\wamp2\www\case\yeti_v2\\');

foreach(new RecursiveIteratorIterator($iterator) as $entry) {
    if($entry->isFile() && filesize($entry->getPathname()) < 100) {
        $nameFile = pathinfo($entry->getPathname(), PATHINFO_FILENAME);
        if($nameFile[0] == '_') {
            continue;
        }
        
        if(pathinfo($entry->getPathname(), PATHINFO_EXTENSION) == 'php') {
            
        }
    }
}